Table 1 List of variables used in data analyses and their codes and classifications

Response variables

Result of the intervention

1) attained good result (over 70%),

2) attained moderate result (31-69%),

3) attained poor result (0-30%)

The success of an intervention measured by

change in activity

1) added/improved in many sectors, 2) added/improved in some sectors, 3) no change, 4) reduced/worsened

Background variables

Gender

1) male, 2) female*

Age

< 63, 64-69, > 70 years*

Marital status

1) married, 2) unmarried*

Education

1) no professional training, 2) vocational school or vocational course, 3) college-level training, 4) academic degree*

Work status

1) working, 2) not working*

Own opinion of own health

1) poor or extremely poor, 2) moderate, 3) good, 4) extremely good*

Earlier participation in research projects

1) yes, 2) no*

Other variables

Participant's knowledge of person in charge

1) yes, 2) no*

Participant's engagement with contact person

1) yes, 2) no, 3) had no need to contact*

Opinion of sufficiency of time during the first visit

0) poor to moderate, 1) good*

Opinion of sufficiency of information given

0) poor to moderate, 1) good*

Opinion of intelligibility of information given

0) poor to moderate, 1) good*

Opinion of sufficiency of information about participants' selection criteria to the study

0) poor to moderate, 1) good*

Adequate possibility to consider participation

1) yes, 2) no*

Participant's view of the purpose of the study

1) answered correctly*, 0) answered incorrectly or left empty

Opinion of whether the research personnel had adequately confirmed that the participant received enough information

0) poor to moderate, 1) good*

Opinion of whether the research personnel had adequately confirmed that the participant had understood the information given

0) poor to moderate, 1) good*